/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/list_flag-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 13:50:37,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 13:50:37,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 13:50:38,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 13:50:38,007 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 13:50:38,008 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 13:50:38,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 13:50:38,011 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 13:50:38,013 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 13:50:38,013 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 13:50:38,014 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 13:50:38,016 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 13:50:38,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 13:50:38,017 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 13:50:38,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 13:50:38,019 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 13:50:38,020 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 13:50:38,021 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 13:50:38,023 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 13:50:38,025 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 13:50:38,026 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 13:50:38,028 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 13:50:38,029 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 13:50:38,030 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 13:50:38,032 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 13:50:38,033 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 13:50:38,033 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 13:50:38,034 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 13:50:38,034 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 13:50:38,035 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 13:50:38,035 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 13:50:38,036 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 13:50:38,037 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 13:50:38,038 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 13:50:38,039 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 13:50:38,039 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 13:50:38,040 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 13:50:38,040 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 13:50:38,040 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 13:50:38,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 13:50:38,042 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 13:50:38,043 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 13:50:38,058 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 13:50:38,058 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 13:50:38,061 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 13:50:38,061 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 13:50:38,062 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 13:50:38,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 13:50:38,062 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 13:50:38,063 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 13:50:38,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 13:50:38,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 13:50:38,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 13:50:38,064 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 13:50:38,064 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 13:50:38,064 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 13:50:38,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 13:50:38,064 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 13:50:38,065 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 13:50:38,065 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 13:50:38,065 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 13:50:38,066 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 13:50:38,066 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 13:50:38,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:50:38,067 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 13:50:38,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 13:50:38,068 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 13:50:38,068 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 13:50:38,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:38,068 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 13:50:38,068 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 13:50:38,069 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 13:50:38,392 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 13:50:38,408 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 13:50:38,412 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 13:50:38,414 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 13:50:38,415 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 13:50:38,416 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list_flag-1.i [2020-07-20 13:50:38,487 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97c4f770f/c168a90680a948499a5c5c2dc84cf0cc/FLAGcae95404c [2020-07-20 13:50:39,063 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 13:50:39,064 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_flag-1.i [2020-07-20 13:50:39,082 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97c4f770f/c168a90680a948499a5c5c2dc84cf0cc/FLAGcae95404c [2020-07-20 13:50:39,418 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97c4f770f/c168a90680a948499a5c5c2dc84cf0cc [2020-07-20 13:50:39,430 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 13:50:39,433 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 13:50:39,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 13:50:39,434 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 13:50:39,438 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 13:50:39,439 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:50:39" (1/1) ... [2020-07-20 13:50:39,443 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65f16eca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:39, skipping insertion in model container [2020-07-20 13:50:39,443 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:50:39" (1/1) ... [2020-07-20 13:50:39,453 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 13:50:39,515 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 13:50:40,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:50:40,045 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 13:50:40,089 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:50:40,151 INFO L208 MainTranslator]: Completed translation [2020-07-20 13:50:40,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:40 WrapperNode [2020-07-20 13:50:40,152 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 13:50:40,153 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 13:50:40,153 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 13:50:40,153 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 13:50:40,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:40" (1/1) ... [2020-07-20 13:50:40,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:40" (1/1) ... [2020-07-20 13:50:40,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:40" (1/1) ... [2020-07-20 13:50:40,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:40" (1/1) ... [2020-07-20 13:50:40,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:40" (1/1) ... [2020-07-20 13:50:40,209 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:40" (1/1) ... [2020-07-20 13:50:40,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:40" (1/1) ... [2020-07-20 13:50:40,224 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 13:50:40,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 13:50:40,225 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 13:50:40,226 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 13:50:40,227 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:50:40,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 13:50:40,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 13:50:40,291 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-20 13:50:40,291 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-20 13:50:40,292 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-07-20 13:50:40,292 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-07-20 13:50:40,292 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-07-20 13:50:40,292 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-20 13:50:40,292 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 13:50:40,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 13:50:40,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 13:50:40,293 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 13:50:40,293 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 13:50:40,293 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 13:50:40,293 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 13:50:40,294 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 13:50:40,294 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 13:50:40,295 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 13:50:40,295 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 13:50:40,295 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 13:50:40,296 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 13:50:40,296 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 13:50:40,296 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 13:50:40,297 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 13:50:40,297 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 13:50:40,299 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 13:50:40,299 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 13:50:40,299 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-20 13:50:40,299 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-20 13:50:40,299 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-07-20 13:50:40,300 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-07-20 13:50:40,300 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-07-20 13:50:40,300 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 13:50:40,300 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 13:50:40,300 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 13:50:40,300 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 13:50:40,301 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 13:50:40,301 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 13:50:40,301 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 13:50:40,301 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 13:50:40,301 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 13:50:40,301 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 13:50:40,301 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 13:50:40,302 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 13:50:40,302 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 13:50:40,303 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 13:50:40,303 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 13:50:40,303 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 13:50:40,303 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 13:50:40,303 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 13:50:40,303 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 13:50:40,304 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 13:50:40,304 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 13:50:40,304 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 13:50:40,304 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 13:50:40,305 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 13:50:40,305 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 13:50:40,305 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 13:50:40,305 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 13:50:40,305 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 13:50:40,306 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 13:50:40,306 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 13:50:40,306 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 13:50:40,306 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 13:50:40,306 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 13:50:40,307 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 13:50:40,307 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 13:50:40,308 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 13:50:40,308 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 13:50:40,308 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 13:50:40,308 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 13:50:40,308 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 13:50:40,309 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 13:50:40,309 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 13:50:40,309 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 13:50:40,310 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 13:50:40,310 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 13:50:40,311 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 13:50:40,311 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 13:50:40,311 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 13:50:40,312 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 13:50:40,312 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 13:50:40,312 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 13:50:40,313 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 13:50:40,313 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 13:50:40,313 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 13:50:40,313 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 13:50:40,313 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 13:50:40,314 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 13:50:40,315 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 13:50:40,315 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 13:50:40,315 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 13:50:40,315 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 13:50:40,315 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 13:50:40,315 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 13:50:40,315 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 13:50:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 13:50:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 13:50:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 13:50:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 13:50:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 13:50:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 13:50:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 13:50:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 13:50:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 13:50:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 13:50:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 13:50:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 13:50:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 13:50:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 13:50:40,318 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 13:50:40,318 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 13:50:40,318 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 13:50:40,318 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 13:50:40,318 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 13:50:40,319 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 13:50:40,319 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 13:50:40,319 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 13:50:40,320 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-20 13:50:40,320 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 13:50:40,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 13:50:40,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 13:50:40,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 13:50:40,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 13:50:40,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 13:50:40,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 13:50:40,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 13:50:40,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 13:50:40,728 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-20 13:50:40,902 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 13:50:40,903 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 13:50:40,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:50:40 BoogieIcfgContainer [2020-07-20 13:50:40,907 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 13:50:40,909 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 13:50:40,909 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 13:50:40,913 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 13:50:40,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:50:39" (1/3) ... [2020-07-20 13:50:40,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@88c1b9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:50:40, skipping insertion in model container [2020-07-20 13:50:40,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:40" (2/3) ... [2020-07-20 13:50:40,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@88c1b9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:50:40, skipping insertion in model container [2020-07-20 13:50:40,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:50:40" (3/3) ... [2020-07-20 13:50:40,917 INFO L109 eAbstractionObserver]: Analyzing ICFG list_flag-1.i [2020-07-20 13:50:40,928 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 13:50:40,939 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 13:50:40,954 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 13:50:40,976 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 13:50:40,976 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 13:50:40,977 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 13:50:40,977 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 13:50:40,977 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 13:50:40,977 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 13:50:40,977 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 13:50:40,978 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 13:50:40,995 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-20 13:50:41,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 13:50:41,001 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:41,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:41,003 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:41,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:41,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1184417696, now seen corresponding path program 1 times [2020-07-20 13:50:41,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:41,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800298545] [2020-07-20 13:50:41,018 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:41,187 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:50:41,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:41,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 13:50:41,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:41,317 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 13:50:41,318 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:50:41,326 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:50:41,326 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:50:41,327 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-07-20 13:50:41,357 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-20 13:50:41,359 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:50:41,362 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:50:41,362 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:50:41,363 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-07-20 13:50:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:50:41,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:41,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800298545] [2020-07-20 13:50:41,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:41,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:50:41,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96972205] [2020-07-20 13:50:41,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:50:41,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:41,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:50:41,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:50:41,402 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 5 states. [2020-07-20 13:50:41,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:41,561 INFO L93 Difference]: Finished difference Result 73 states and 103 transitions. [2020-07-20 13:50:41,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:50:41,564 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-20 13:50:41,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:41,576 INFO L225 Difference]: With dead ends: 73 [2020-07-20 13:50:41,576 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 13:50:41,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 13:50:41,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 13:50:41,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2020-07-20 13:50:41,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 13:50:41,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-07-20 13:50:41,635 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 15 [2020-07-20 13:50:41,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:41,636 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-07-20 13:50:41,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:50:41,636 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-07-20 13:50:41,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 13:50:41,638 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:41,638 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:41,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:41,853 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:41,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:41,854 INFO L82 PathProgramCache]: Analyzing trace with hash 771025649, now seen corresponding path program 1 times [2020-07-20 13:50:41,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:41,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598909096] [2020-07-20 13:50:41,856 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:41,987 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:50:41,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:41,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 13:50:41,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:42,009 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 13:50:42,009 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:50:42,013 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:50:42,013 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:50:42,013 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-07-20 13:50:42,027 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-20 13:50:42,028 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:50:42,031 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:50:42,031 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:50:42,032 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-07-20 13:50:42,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:50:42,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:42,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598909096] [2020-07-20 13:50:42,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:42,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:50:42,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006883370] [2020-07-20 13:50:42,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:50:42,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:42,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:50:42,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:50:42,052 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 5 states. [2020-07-20 13:50:42,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:42,146 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-07-20 13:50:42,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:50:42,146 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-20 13:50:42,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:42,148 INFO L225 Difference]: With dead ends: 50 [2020-07-20 13:50:42,148 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 13:50:42,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 13:50:42,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 13:50:42,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2020-07-20 13:50:42,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 13:50:42,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-07-20 13:50:42,159 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 19 [2020-07-20 13:50:42,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:42,160 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-07-20 13:50:42,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:50:42,160 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-07-20 13:50:42,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 13:50:42,161 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:42,161 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:42,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:42,375 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:42,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:42,376 INFO L82 PathProgramCache]: Analyzing trace with hash -472715872, now seen corresponding path program 1 times [2020-07-20 13:50:42,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:42,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122489846] [2020-07-20 13:50:42,377 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:42,494 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:50:42,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:42,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 13:50:42,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:42,540 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 13:50:42,541 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:50:42,545 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:50:42,545 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:50:42,546 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-07-20 13:50:42,569 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-20 13:50:42,572 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:50:42,577 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:50:42,577 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:50:42,578 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-07-20 13:50:42,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:50:42,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:42,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122489846] [2020-07-20 13:50:42,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:42,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:50:42,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587775211] [2020-07-20 13:50:42,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:50:42,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:42,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:50:42,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:50:42,600 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2020-07-20 13:50:42,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:42,729 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2020-07-20 13:50:42,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:50:42,730 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-20 13:50:42,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:42,732 INFO L225 Difference]: With dead ends: 48 [2020-07-20 13:50:42,732 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 13:50:42,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 13:50:42,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 13:50:42,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2020-07-20 13:50:42,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 13:50:42,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-07-20 13:50:42,747 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 19 [2020-07-20 13:50:42,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:42,748 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-07-20 13:50:42,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:50:42,748 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-07-20 13:50:42,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 13:50:42,751 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:42,751 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:42,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:42,967 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:42,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:42,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1962636917, now seen corresponding path program 1 times [2020-07-20 13:50:42,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:42,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799391101] [2020-07-20 13:50:42,970 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:43,114 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:50:43,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:43,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 13:50:43,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:43,129 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-20 13:50:43,130 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:50:43,141 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:50:43,142 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:50:43,142 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-20 13:50:43,170 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 13:50:43,171 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:50:43,182 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:50:43,182 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:50:43,183 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2020-07-20 13:50:43,215 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:50:43,216 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-20 13:50:43,217 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:50:43,228 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:50:43,229 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:50:43,229 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:21 [2020-07-20 13:50:43,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:50:43,265 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2020-07-20 13:50:43,266 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:50:43,273 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:50:43,274 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:50:43,274 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:15 [2020-07-20 13:50:43,301 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-07-20 13:50:43,303 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:50:43,313 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:50:43,315 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-20 13:50:43,316 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:22 [2020-07-20 13:50:43,363 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2020-07-20 13:50:43,364 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:50:43,369 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:50:43,370 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:50:43,371 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:26, output treesize:3 [2020-07-20 13:50:43,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:50:43,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:50:43,818 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~p~0.offset Int)) (= 1 (select (select (store |c_#memory_int| c_main_~p~0.base (store (select |c_#memory_int| c_main_~p~0.base) main_~p~0.offset 3)) c_main_~a~0.base) c_main_~a~0.offset))) is different from false [2020-07-20 13:50:43,839 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 13:50:43,854 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:50:43,855 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-20 13:50:43,855 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:35 [2020-07-20 13:50:44,424 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_prenex_1 Int) (v_DerPreprocessor_1 Int)) (= 1 (select (select (let ((.cse0 (store |c_#memory_int| c_main_~p~0.base (store (select |c_#memory_int| c_main_~p~0.base) (+ c_main_~p~0.offset 4) v_DerPreprocessor_1)))) (store .cse0 c_main_~t~0.base (store (select .cse0 c_main_~t~0.base) v_prenex_1 3))) c_main_~a~0.base) c_main_~a~0.offset))) is different from false [2020-07-20 13:50:44,486 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 236 treesize of output 228 [2020-07-20 13:50:44,489 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:50:44,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:50:44,492 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:50:44,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:50:44,500 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-20 13:50:44,647 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2020-07-20 13:50:44,649 INFO L624 ElimStorePlain]: treesize reduction 316, result has 14.6 percent of original size [2020-07-20 13:50:44,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:50:44,653 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:50:44,655 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-20 13:50:44,655 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:48, output treesize:54 [2020-07-20 13:50:44,657 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:50:44,657 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:50:44,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:50:45,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:50:45,631 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:50:46,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:50:46,347 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:50:47,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:50:47,869 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:50:47,872 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:50:47,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2020-07-20 13:50:47,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799391101] [2020-07-20 13:50:47,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:50:47,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-07-20 13:50:47,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239117202] [2020-07-20 13:50:47,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 13:50:47,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:47,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 13:50:47,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=120, Unknown=3, NotChecked=46, Total=210 [2020-07-20 13:50:47,926 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 15 states. [2020-07-20 13:50:48,954 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 20 [2020-07-20 13:50:50,831 WARN L193 SmtUtils]: Spent 947.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 22 [2020-07-20 13:50:54,177 WARN L193 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2020-07-20 13:50:55,505 WARN L193 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2020-07-20 13:51:03,339 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 13:51:13,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:51:13,232 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2020-07-20 13:51:13,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 13:51:13,233 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2020-07-20 13:51:13,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:51:13,238 INFO L225 Difference]: With dead ends: 79 [2020-07-20 13:51:13,238 INFO L226 Difference]: Without dead ends: 75 [2020-07-20 13:51:13,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=135, Invalid=368, Unknown=11, NotChecked=86, Total=600 [2020-07-20 13:51:13,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-20 13:51:13,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 42. [2020-07-20 13:51:13,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 13:51:13,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2020-07-20 13:51:13,250 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 23 [2020-07-20 13:51:13,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:51:13,250 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2020-07-20 13:51:13,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 13:51:13,250 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2020-07-20 13:51:13,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 13:51:13,251 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:51:13,252 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:51:13,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:51:13,456 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:51:13,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:51:13,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1888593434, now seen corresponding path program 1 times [2020-07-20 13:51:13,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:51:13,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150909058] [2020-07-20 13:51:13,458 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:51:13,577 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:51:13,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 13:51:13,578 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 13:51:13,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 13:51:13,593 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 13:51:13,620 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 13:51:13,621 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 13:51:13,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:51:13,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:51:13 BoogieIcfgContainer [2020-07-20 13:51:13,871 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 13:51:13,873 INFO L168 Benchmark]: Toolchain (without parser) took 34441.38 ms. Allocated memory was 136.8 MB in the beginning and 252.2 MB in the end (delta: 115.3 MB). Free memory was 100.9 MB in the beginning and 155.6 MB in the end (delta: -54.7 MB). Peak memory consumption was 60.7 MB. Max. memory is 7.1 GB. [2020-07-20 13:51:13,874 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 13:51:13,875 INFO L168 Benchmark]: CACSL2BoogieTranslator took 718.50 ms. Allocated memory was 136.8 MB in the beginning and 201.3 MB in the end (delta: 64.5 MB). Free memory was 100.5 MB in the beginning and 167.6 MB in the end (delta: -67.1 MB). Peak memory consumption was 26.2 MB. Max. memory is 7.1 GB. [2020-07-20 13:51:13,876 INFO L168 Benchmark]: Boogie Preprocessor took 71.82 ms. Allocated memory is still 201.3 MB. Free memory was 167.6 MB in the beginning and 164.8 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-07-20 13:51:13,876 INFO L168 Benchmark]: RCFGBuilder took 682.04 ms. Allocated memory is still 201.3 MB. Free memory was 164.8 MB in the beginning and 121.2 MB in the end (delta: 43.6 MB). Peak memory consumption was 43.6 MB. Max. memory is 7.1 GB. [2020-07-20 13:51:13,877 INFO L168 Benchmark]: TraceAbstraction took 32962.08 ms. Allocated memory was 201.3 MB in the beginning and 252.2 MB in the end (delta: 50.9 MB). Free memory was 120.5 MB in the beginning and 155.6 MB in the end (delta: -35.1 MB). Peak memory consumption was 15.8 MB. Max. memory is 7.1 GB. [2020-07-20 13:51:13,880 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 718.50 ms. Allocated memory was 136.8 MB in the beginning and 201.3 MB in the end (delta: 64.5 MB). Free memory was 100.5 MB in the beginning and 167.6 MB in the end (delta: -67.1 MB). Peak memory consumption was 26.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 71.82 ms. Allocated memory is still 201.3 MB. Free memory was 167.6 MB in the beginning and 164.8 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 682.04 ms. Allocated memory is still 201.3 MB. Free memory was 164.8 MB in the beginning and 121.2 MB in the end (delta: 43.6 MB). Peak memory consumption was 43.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 32962.08 ms. Allocated memory was 201.3 MB in the beginning and 252.2 MB in the end (delta: 50.9 MB). Free memory was 120.5 MB in the beginning and 155.6 MB in the end (delta: -35.1 MB). Peak memory consumption was 15.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 546]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] int flag = __VERIFIER_nondet_int(); [L522] List p, a, t; [L523] a = (List) malloc(sizeof(struct node)) VAL [a={5854:0}, flag=1, malloc(sizeof(struct node))={5854:0}] [L524] COND FALSE !(a == 0) VAL [a={5854:0}, flag=1, malloc(sizeof(struct node))={5854:0}] [L525] p = a VAL [a={5854:0}, flag=1, malloc(sizeof(struct node))={5854:0}, p={5854:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] COND TRUE \read(flag) [L528] p->h = 1 VAL [a={5854:0}, flag=1, malloc(sizeof(struct node))={5854:0}, p={5854:0}] [L532] t = (List) malloc(sizeof(struct node)) VAL [a={5854:0}, flag=1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={5854:0}, p={5854:0}, t={-1:0}] [L533] COND FALSE !(t == 0) VAL [a={5854:0}, flag=1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={5854:0}, p={5854:0}, t={-1:0}] [L534] p->n = t [L535] EXPR p->n [L535] p = p->n [L526] COND FALSE !(__VERIFIER_nondet_int()) [L537] p->h = 3 [L538] p = a VAL [a={5854:0}, flag=1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={5854:0}, p={5854:0}, t={-1:0}] [L539] COND TRUE \read(flag) VAL [a={5854:0}, flag=1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={5854:0}, p={5854:0}, t={-1:0}] [L540] EXPR p->h VAL [a={5854:0}, flag=1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={5854:0}, p={5854:0}, p->h=1, t={-1:0}] [L540] COND FALSE !(p->h == 2) [L545] EXPR p->h VAL [a={5854:0}, flag=1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={5854:0}, p={5854:0}, p->h=1, t={-1:0}] [L545] COND TRUE p->h != 3 [L546] __VERIFIER_error() VAL [a={5854:0}, flag=1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={5854:0}, p={5854:0}, t={-1:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 32.8s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 25.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 89 SDtfs, 168 SDslu, 329 SDs, 0 SdLazy, 291 SolverSat, 45 SolverUnsat, 15 SolverUnknown, 0 SolverNotchecked, 16.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 112 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 13.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 69 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.1s InterpolantComputationTime, 99 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 94 ConstructedInterpolants, 11 QuantifiedInterpolants, 15556 SizeOfPredicates, 29 NumberOfNonLiveVariables, 233 ConjunctsInSsa, 62 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 4/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...